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handle database upgradation

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houxg
2016-11-29 18:09:11 +08:00
parent c577dc2670
commit f8bfbf5098
1 changed files with 51 additions and 1 deletions
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52
app/src/main/java/org/houxg/leamonax/database/AppDataBase.java
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@@ -1,11 +1,16 @@
package org.houxg.leamonax.database;
import android.database.Cursor;
import android.text.TextUtils;
import android.util.Log;
import com.raizlabs.android.dbflow.annotation.Database;
import com.raizlabs.android.dbflow.annotation.Migration;
import com.raizlabs.android.dbflow.sql.language.Join;
import com.raizlabs.android.dbflow.sql.language.NameAlias;
import com.raizlabs.android.dbflow.sql.language.SQLite;
import com.raizlabs.android.dbflow.sql.migration.BaseMigration;
import com.raizlabs.android.dbflow.structure.database.DatabaseWrapper;
import org.houxg.leamonax.model.Account;
import org.houxg.leamonax.model.Account_Table;
@@ -25,11 +30,56 @@ import java.util.Collection;
import java.util.List;
//TODO:upgrade to Ver.2, handle tags
@Database(name = "leanote_db", version = 1)
@Database(name = "leanote_db", version = 2)
public class AppDataBase {
private static final String TAG = "AppDataBase";
@Migration(version = 2, database = AppDataBase.class)
public static class UpdateTag extends BaseMigration {
@Override
public void migrate(DatabaseWrapper database) {
Cursor cursor = SQLite.select()
.from(Note.class)
.where(Note_Table.tags.notEq(""))
.query(database);
if (cursor == null) {
return;
}
int idIndex = cursor.getColumnIndex("id");
int tagIndex = cursor.getColumnIndex("tags");
int uidIndex = cursor.getColumnIndex("userId");
while (cursor.moveToNext()) {
String tag = cursor.getString(tagIndex);
String uid = cursor.getString(uidIndex);
long noteLocalId = cursor.getLong(idIndex);
String[] tagTexts = tag.split(",");
for (String tagText : tagTexts) {
tagText = tagText.trim();
if (TextUtils.isEmpty(tagText)) {
continue;
}
Tag tagModel = SQLite.select()
.from(Tag.class)
.where(Tag_Table.userId.eq(uid))
.and(Tag_Table.text.eq(tag))
.querySingle(database);
long tagId;
if (tagModel == null) {
tagModel = new Tag(uid, tagText);
tagModel.insert(database);
}
tagId = tagModel.getId();
RelationshipOfNoteTag relationship = new RelationshipOfNoteTag(noteLocalId, tagId, uid);
relationship.insert(database);
}
}
cursor.close();
}
}
public static void deleteNoteByLocalId(long localId) {
SQLite.delete().from(Note.class)
.where(Note_Table.id.eq(localId))